> On Feb 9, 2024, at 10:00 AM, David Barron <david(dot)barron(at)zencos(dot)com> wrote:
>
> I’ve also seen references to copying over the pg_hba.conf and postgresql.conf files from the old data directory to the new.
Then you will be getting default values for the many, many parameters added to postgresql.conf between 11 & 15--and will have no explanatory entries documenting them. A much better suggestion is to diff the two, and apply customizations from the old to the new. (Also skim release notes for any that have been mooted.)